Hydrogen production in radiolysis of the mixture of mordenite and seawater

Kumagai, Yuta   ; Nagaishi, Ryuji ; Kimura, Atsushi; Taguchi, Mitsumasa; Nishihara, Kenji  ; Yamagishi, Isao ; Ogawa, Toru

For decontamination of radioactive water, zeolite is a suitable adsorbent for radioactive Cs. The management of hydrogen produced by water radiolysis is an important issue of safety. Thus hydrogen production from the mixture of mordenite-type zeolite and water was studied. In particular, we focused on the influence of the incorporation of seawater into the mixture. The hydrogen yield from the mixture decreased monotonically as the weight fraction of seawater was decreased. However, the measured yield was higher than the yield expected from the direct radiolysis of water in the mixture. Moreover the hydrogen yield was not so effectively decreased by the dilution of seawater in the mixture as in seawater alone. Therefore the additional formation of hydrogen should be considered in the evaluation of hydrogen production from radiolysis of the mixture of mordnite and water.